snapmergepuppy improvemets by SFR

Do not escape backslash while reading ; save trash content;
check if pup_ro1 is mounted
See: http://www.murga-linux.com/puppy/viewtopic.php?p=744496#744496
Merge branch 'testing' of https://github.com/puppylinux-woof-CE/woof-CE into testing